code: def empty_deserializer():
      deserializer = Mock(name="deserializer")
      deserializer.deserialize = Mock(
          name="deserialize", return_value=RETURN_VALUE
      )
      return deserializer
  
file_path: sagemaker-python-sdk/tests/unit/sagemaker/async_inference/test_async_inference_response.py
imports: from __future__ import absolute_import
  import pytest
  from mock import Mock
  from botocore.exceptions import ClientError
  from sagemaker.predictor import Predictor
  from sagemaker.predictor_async import AsyncPredictor
  from sagemaker.async_inference import AsyncInferenceResponse
  from sagemaker.exceptions import AsyncInferenceModelError, ObjectNotExistedError, UnexpectedClientError
label_desc: Use image node_id 4 for calling a global function with example usage: empty_deserializer() and returns: deserializer